Supervisory remote control system

Claim 1

IN A SUPERVISORY CONTROL SYSTEM INCLUDING A CONTROL UNIT, A CONTROLLED UNIT, A CONTROL COMMUNICATION CHANNEL, AND A SUPERVISORY COMMUNICATION CHANNEL; THE IMPROVEMENT WHICH INCLUDES; A CONTROL CODE GENERATOR OPERABLE WHEN ACTUATED TO GENERATE A PLURAL DIGIT CODE, A CONTROL CODE RECEIVER LOCATED AT SAID CONTROLLED UNIT, A CONFIRMATION CODE GENERATOR LOCATED AT SAID CONTROLLED UNIT, A CONFORMATION CODE RECEIVER, A FIRST CODE ESTABLISHING DEVICE LOCATED AT SAID CONTROL UNIT OPERABLY CONNECTED TO SAID CONTROL CODE GENERATOR AND ACTUATABLE TO CONDITION SAID CONTROL CODE GENERATOR TO GENERATE A PREDETERMINED PLURAL DIGIT CODE, INDEPENDENT ACTUATING MEANS LOCATED AT SAID CONTROL UNIT FOR SIMULTANEOUSLY ACTUATING SAID CONTROL CODE GENERATOR AND SAID FIRST CODE ESTABLISHING DEVICE THEREBY TO INITIATE GENERATION OF SAID PREDETERMINED PLURAL DIGIT CODE, SAID CONTROL CODE GENERATOR BEING CONNECTED TO SAID CONTROL COMMUNICATION CHANNEL TO TRANSMIT A CODE GENERATED BY SAID CONTROL CODE GENERATOR ON SAID CONTROL COMMUNICATION CHANNEL, SAID CONTROL CODE RECEIVER ALSO BEING CONNECTED TO SAID CONTROL COMMUNICATION CHANNEL TO RECEIVE A CODE GENERATED BY A SAID CONTROL CODE GENERATOR AND TRANSMITTED ON SAID CONTROL COMMUNICATION CHANNEL, A FIRST CODE DIGIT RESPONSIVE DEVICE LOCATED AT SAID CONTROLLED UNIT CONNECTED TO SAID CONTROL CODE RECEIVER TO BE ACTUATED THEREBY UPON RECEIPT OF THE FIRST DIGIT OF SAID PREDETERMINED PLURAL DIGIT CODE AT SAID CONTROL CODE RECEIVER, A SECOND CODE DIGIT RESPONSIVE DEVICE LOCATED AT SAID CONTROLLED UNIT, MEANS ASSOCIATED WITH SAID